The term EDIBLE ANDEAN TUBER can be summarized as a type of root vegetable that is native to the Andes region and is edible. OCA (Oxalis tuberosa) is one example of an edible Andean tuber, which is a small, starchy root vegetable with a mild flavor. It is a popular food in Peru, Ecuador, and Bolivia, and is often boiled, roasted, or fried. OCA is high in carbohydrates and vitamins A and C, and is a good source of dietary fiber.